Envelop.



No. 805,821. PATENTED NOV. 21, 1905. G. N. RENNO. ENVELOP.

APPLICATION FILED JUNE 2. 1905.

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art/0 6114 UNITED STATES PATENT OFFICE.

GEORGE N. RENNO, OF EAST PITTSBURG, PENNSYLVANIA, ASSIGNOR OF ONE-HALF TO FRANK STEWART, OF WILKINSBURG, PENNSYLVANIA.

ENVELOP- Specification of Letters Patent.

Patented Nov. 21, 1905.

To crZZ 'LU/ '7/C77l/ it Netty concern.-

Be it known that L-GEORGE N. RENNO, a citizen of the United States of America, residing at East Pittsburg, in the county of Allegheny and State of Pennsylvania, have invented certain new and useful Improvements in Envelops, of which the following is a specification, reference being had therein to the accom panying drawings. v

This invention relates to certain new and useful improvements in envelops, and has for its object the provision of novel means whereby an envelop cannot be opened without detection.-

provide an inclosure for letters or valuable papers that will be extremely simple in construction, strong and durable, comparatively inexpensive to manufacture, and highly eflicient for transmitting letters or valuable documents.

The invention finally consists in the novel construction, combination, and arrangement of parts to be hereinafter more fully described and then specifically pointed out in the claims, and, referring to the drawings accompanying this application, like numerals of reference designate correspondingparts throughout the several views, in which Figure 1 is a plan View of an envelop-blank constructed in accordance with my invention. Fig. 2 is a similar view with the side flaps of the envelopfolded in position. Fig. 3 is a plan view of my improved envelop in an open position. Fig. 4 is a similar view, partly sealed; and Fig. 5 is a plan view of the envelop in a sealed condition.

To put my invention into practice, I construct my improved envelop of a body portion or frontl, which is formed with end flaps 2 2, a side flap 3, and a sealing-flap A. The end flaps 2 2 upon their outer edges are provided with upwardly-extending tongues 5 and 5'. Both sides of the tongue 5 are provided with adhesive material, while one side of the tongue 5 is provided with similar material employed for securing the tongue 5' in engagement with the tongue 5. The upper ends of the tongues 5 and 5 are cut away to form substantially pointed ends 5 the object of which will be presently described. The side flap 3, which forms a part of the back of the envelop, is cut away, as indicated at 6, forming a central tongue 6, the rear face of which is provided with adhesive material, as indicated at 7. The rear face of the side flap 3 is also provided with a similar material adapted to engage the end flaps 2 2 and retain said flaps in a closed position. The sealing-flap A is provided with two horiZontally-alined slots 8 and 8, adapted to receive the tongues 5 and 5' and 6. v

In Fig. 2 of the drawings I have illustrated the first step taken when constructing my improved envelop. It will be observed that the side flap 3 is folded upon the body portion or front 1 of the envelop, the tongue 6 extending upwardly over the sealing-flap 4 and the slots 8 8. The folding-in of the end flaps 2 2 constitutes the next step, and these flaps are adapted to be moistened and secured to the rear face of the side flap 3, the adhesive material of the tongues also adhering to one another and eventually forming a three ply tongue,which in its entirety I have designated 9. After theletter or papers have been placed within the envelop the sealing-flap 4 is folded upon the end flaps 2 2, the tongue 9 being passed through the slot 8 and inserted in the slot 8. The rear face of the tongue 9 is provided with suitable adhesive material, which is moistened prior to its insertion in the slot 8. The tongue is adapted to be bent downwardly into the envelop, and by pressing the front and rear faces ofthe envelop together the tongue 9 can be firmly sealed in engagement with the envelop upon the interior thereof. The formation of the ends of the tongues 5 and 5' facilitates the easy insertion of the tongue 9 within the slots 8 8. Consequently the envelop can be easily and quickly sealed when it is to be used. The sealing of the ends of the tongues within the envelop prevents the envelop from being steamed to melt or liquefy the adhesive material, whereby the envelop could be easily opened, and when the tongues have been firmly sealed within the envelop it will be impossible for the same to be tampered with or opened without such act being detected.

It is thought from the foregoing that the construction, operation, and ad vantages of the herein-described envelop will be apparent without further description, and various changes in the form, proportion, and minor details of construction may be resorted to Without departing from the spirit of the invention or sacrificing any of the advantages thereof.

What I claim, and desire to secure by Letters Patent, is

1. An envelop of the character described consisting of a body portion having end flaps, a side flap and a sealing-flap, said sealing-flap havingslots formed therein, upwardly-extending tongues carried by said end flaps, a tongue carried centrally of said side flap, adhesive material carried by said tongues, said tongues being adapted to be passed through the slots of said sealing-flap and secured Within said envelop, substantially as described.

2. An envelop of the character described comprising a body portion having end flaps,- a side flap and a sealing-flap, said sealing-flap having slots formed therein, tongues carried by the other of said flaps and adapted to be secured together, said tongues being passed through said slots and secured Within said en- GEORGE N. RENNO.

Witnesses:

H. C. EVERT, E. E. POTTER. 

